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-rw-r--r--fs/btrfs/ctree.h150
1 files changed, 118 insertions, 32 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 547b7b05727f..0d82922179db 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -31,10 +31,10 @@
#include <trace/events/btrfs.h>
#include <asm/kmap_types.h>
#include <linux/pagemap.h>
+#include <linux/btrfs.h>
#include "extent_io.h"
#include "extent_map.h"
#include "async-thread.h"
-#include "ioctl.h"
struct btrfs_trans_handle;
struct btrfs_transaction;
@@ -46,7 +46,7 @@ extern struct kmem_cache *btrfs_path_cachep;
extern struct kmem_cache *btrfs_free_space_cachep;
struct btrfs_ordered_sum;
-#define BTRFS_MAGIC "_BHRfS_M"
+#define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
#define BTRFS_MAX_MIRRORS 3
@@ -191,6 +191,8 @@ static int btrfs_csum_sizes[] = { 4, 0 };
/* ioprio of readahead is set to idle */
#define BTRFS_IOPRIO_READA (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_IDLE, 0))
+#define BTRFS_DIRTY_METADATA_THRESH (32 * 1024 * 1024)
+
/*
* The key defines the order in the tree, and so it also defines (optimal)
* block layout.
@@ -336,7 +338,10 @@ static inline unsigned long btrfs_chunk_item_size(int num_stripes)
/*
* File system states
*/
+#define BTRFS_FS_STATE_ERROR 0
+#define BTRFS_FS_STATE_REMOUNTING 1
+/* Super block flags */
/* Errors detected */
#define BTRFS_SUPER_FLAG_ERROR (1ULL << 2)
@@ -502,6 +507,7 @@ struct btrfs_super_block {
#define BTRFS_FEATURE_INCOMPAT_BIG_METADATA (1ULL << 5)
#define BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF (1ULL << 6)
+#define BTRFS_FEATURE_INCOMPAT_RAID56 (1ULL << 7)
#define BTRFS_FEATURE_COMPAT_SUPP 0ULL
#define BTRFS_FEATURE_COMPAT_RO_SUPP 0ULL
@@ -511,6 +517,7 @@ struct btrfs_super_block {
BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS | \
BTRFS_FEATURE_INCOMPAT_BIG_METADATA | \
BTRFS_FEATURE_INCOMPAT_COMPRESS_LZO | \
+ BTRFS_FEATURE_INCOMPAT_RAID56 | \
BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF)
/*
@@ -952,8 +959,20 @@ struct btrfs_dev_replace_item {
#define BTRFS_BLOCK_GROUP_RAID1 (1ULL << 4)
#define BTRFS_BLOCK_GROUP_DUP (1ULL << 5)
#define BTRFS_BLOCK_GROUP_RAID10 (1ULL << 6)
+#define BTRFS_BLOCK_GROUP_RAID5 (1 << 7)
+#define BTRFS_BLOCK_GROUP_RAID6 (1 << 8)
#define BTRFS_BLOCK_GROUP_RESERVED BTRFS_AVAIL_ALLOC_BIT_SINGLE
-#define BTRFS_NR_RAID_TYPES 5
+
+enum btrfs_raid_types {
+ BTRFS_RAID_RAID10,
+ BTRFS_RAID_RAID1,
+ BTRFS_RAID_DUP,
+ BTRFS_RAID_RAID0,
+ BTRFS_RAID_SINGLE,
+ BTRFS_RAID_RAID5,
+ BTRFS_RAID_RAID6,
+ BTRFS_NR_RAID_TYPES
+};
#define BTRFS_BLOCK_GROUP_TYPE_MASK (BTRFS_BLOCK_GROUP_DATA | \
BTRFS_BLOCK_GROUP_SYSTEM | \
@@ -961,6 +980,8 @@ struct btrfs_dev_replace_item {
#define BTRFS_BLOCK_GROUP_PROFILE_MASK (BTRFS_BLOCK_GROUP_RAID0 | \
BTRFS_BLOCK_GROUP_RAID1 | \
+ BTRFS_BLOCK_GROUP_RAID5 | \
+ BTRFS_BLOCK_GROUP_RAID6 | \
BTRFS_BLOCK_GROUP_DUP | \
BTRFS_BLOCK_GROUP_RAID10)
/*
@@ -1185,6 +1206,10 @@ struct btrfs_block_group_cache {
u64 flags;
u64 sectorsize;
u64 cache_generation;
+
+ /* for raid56, this is a full stripe, without parity */
+ unsigned long full_stripe_len;
+
unsigned int ro:1;
unsigned int dirty:1;
unsigned int iref:1;
@@ -1225,6 +1250,28 @@ struct seq_list {
u64 seq;
};
+enum btrfs_orphan_cleanup_state {
+ ORPHAN_CLEANUP_STARTED = 1,
+ ORPHAN_CLEANUP_DONE = 2,
+};
+
+/* used by the raid56 code to lock stripes for read/modify/write */
+struct btrfs_stripe_hash {
+ struct list_head hash_list;
+ wait_queue_head_t wait;
+ spinlock_t lock;
+};
+
+/* used by the raid56 code to lock stripes for read/modify/write */
+struct btrfs_stripe_hash_table {
+ struct list_head stripe_cache;
+ spinlock_t cache_lock;
+ int cache_size;
+ struct btrfs_stripe_hash table[];
+};
+
+#define BTRFS_STRIPE_HASH_TABLE_BITS 11
+
/* fs_info */
struct reloc_control;
struct btrfs_device;
@@ -1250,6 +1297,7 @@ struct btrfs_fs_info {
/* block group cache stuff */
spinlock_t block_group_cache_lock;
+ u64 first_logical_byte;
struct rb_root block_group_cache_tree;
/* keep track of unallocated space */
@@ -1288,7 +1336,23 @@ struct btrfs_fs_info {
u64 last_trans_log_full_commit;
unsigned long mount_opt;
unsigned long compress_type:4;
+ /*
+ * It is a suggestive number, the read side is safe even it gets a
+ * wrong number because we will write out the data into a regular
+ * extent. The write side(mount/remount) is under ->s_umount lock,
+ * so it is also safe.
+ */
u64 max_inline;
+ /*
+ * Protected by ->chunk_mutex and sb->s_umount.
+ *
+ * The reason that we use two lock to protect it is because only
+ * remount and mount operations can change it and these two operations
+ * are under sb->s_umount, but the read side (chunk allocation) can not
+ * acquire sb->s_umount or the deadlock would happen. So we use two
+ * locks to protect it. On the write side, we must acquire two locks,
+ * and on the read side, we just need acquire one of them.
+ */
u64 alloc_start;
struct btrfs_transaction *running_transaction;
wait_queue_head_t transaction_throttle;
@@ -1307,6 +1371,13 @@ struct btrfs_fs_info {
struct mutex cleaner_mutex;
struct mutex chunk_mutex;
struct mutex volume_mutex;
+
+ /* this is used during read/modify/write to make sure
+ * no two ios are trying to mod the same stripe at the same
+ * time
+ */
+ struct btrfs_stripe_hash_table *stripe_hash_table;
+
/*
* this protects the ordered operations list only while we are
* processing all of the entries on it. This way we make
@@ -1365,6 +1436,7 @@ struct btrfs_fs_info {
*/
struct list_head ordered_extents;
+ spinlock_t delalloc_lock;
/*
* all of the inodes that have delalloc bytes. It is possible for
* this list to be empty even when there is still dirty data=ordered
@@ -1373,13 +1445,6 @@ struct btrfs_fs_info {
struct list_head delalloc_inodes;
/*
- * special rename and truncate targets that must be on disk before
- * we're allowed to commit. This is basically the ext3 style
- * data=ordered list.
- */
- struct list_head ordered_operations;
-
- /*
* there is a pool of worker threads for checksumming during writes
* and a pool for checksumming after reads. This is because readers
* can run with FS locks held, and the writers may be waiting for
@@ -1395,6 +1460,8 @@ struct btrfs_fs_info {
struct btrfs_workers flush_workers;
struct btrfs_workers endio_workers;
struct btrfs_workers endio_meta_workers;
+ struct btrfs_workers endio_raid56_workers;
+ struct btrfs_workers rmw_workers;
struct btrfs_workers endio_meta_write_workers;
struct btrfs_workers endio_write_workers;
struct btrfs_workers endio_freespace_worker;
@@ -1423,10 +1490,12 @@ struct btrfs_fs_info {
u64 total_pinned;
- /* protected by the delalloc lock, used to keep from writing
- * metadata until there is a nice batch
- */
- u64 dirty_metadata_bytes;
+ /* used to keep from writing metadata until there is a nice batch */
+ struct percpu_counter dirty_metadata_bytes;
+ struct percpu_counter delalloc_bytes;
+ s32 dirty_metadata_batch;
+ s32 delalloc_batch;
+
struct list_head dirty_cowonly_roots;
struct btrfs_fs_devices *fs_devices;
@@ -1442,9 +1511,6 @@ struct btrfs_fs_info {
struct reloc_control *reloc_ctl;
- spinlock_t delalloc_lock;
- u64 delalloc_bytes;
-
/* data_alloc_cluster is only used in ssd mode */
struct btrfs_free_cluster data_alloc_cluster;
@@ -1456,6 +1522,8 @@ struct btrfs_fs_info {
struct rb_root defrag_inodes;
atomic_t defrag_running;
+ /* Used to protect avail_{data, metadata, system}_alloc_bits */
+ seqlock_t profiles_lock;
/*
* these three are in extended format (availability of single
* chunks is denoted by BTRFS_AVAIL_ALLOC_BIT_SINGLE bit, other
@@ -1520,7 +1588,7 @@ struct btrfs_fs_info {
u64 qgroup_seq;
/* filesystem state */
- u64 fs_state;
+ unsigned long fs_state;
struct btrfs_delayed_root *delayed_root;
@@ -1623,6 +1691,9 @@ struct btrfs_root {
struct list_head root_list;
+ spinlock_t log_extents_lock[2];
+ struct list_head logged_list[2];
+
spinlock_t orphan_lock;
atomic_t orphan_inodes;
struct btrfs_block_rsv *orphan_block_rsv;
@@ -1832,6 +1903,7 @@ struct btrfs_ioctl_defrag_range_args {
#define btrfs_clear_opt(o, opt) ((o) &= ~BTRFS_MOUNT_##opt)
#define btrfs_set_opt(o, opt) ((o) |= BTRFS_MOUNT_##opt)
+#define btrfs_raw_test_opt(o, opt) ((o) & BTRFS_MOUNT_##opt)
#define btrfs_test_opt(root, opt) ((root)->fs_info->mount_opt & \
BTRFS_MOUNT_##opt)
/*
@@ -2936,8 +3008,7 @@ int btrfs_lookup_extent_info(struct btrfs_trans_handle *trans,
u64 num_bytes, u64 *refs, u64 *flags);
int btrfs_pin_extent(struct btrfs_root *root,
u64 bytenr, u64 num, int reserved);
-int btrfs_pin_extent_for_log_replay(struct btrfs_trans_handle *trans,
- struct btrfs_root *root,
+int btrfs_pin_extent_for_log_replay(struct btrfs_root *root,
u64 bytenr, u64 num_bytes);
int btrfs_cross_ref_exist(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
@@ -3035,8 +3106,13 @@ void btrfs_trans_release_metadata(struct btrfs_trans_handle *trans,
int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
struct inode *inode);
void btrfs_orphan_release_metadata(struct inode *inode);
-int btrfs_snap_reserve_metadata(struct btrfs_trans_handle *trans,
- struct btrfs_pending_snapshot *pending);
+int btrfs_subvolume_reserve_metadata(struct btrfs_root *root,
+ struct btrfs_block_rsv *rsv,
+ int nitems,
+ u64 *qgroup_reserved);
+void btrfs_subvolume_release_metadata(struct btrfs_root *root,
+ struct btrfs_block_rsv *rsv,
+ u64 qgroup_reserved);
int btrfs_delalloc_reserve_metadata(struct inode *inode, u64 num_bytes);
void btrfs_delalloc_release_metadata(struct inode *inode, u64 num_bytes);
int btrfs_delalloc_reserve_space(struct inode *inode, u64 num_bytes);
@@ -3092,10 +3168,10 @@ struct extent_buffer *btrfs_root_node(struct btrfs_root *root);
struct extent_buffer *btrfs_lock_root_node(struct btrfs_root *root);
int btrfs_find_next_key(struct btrfs_root *root, struct btrfs_path *path,
struct btrfs_key *key, int lowest_level,
- int cache_only, u64 min_trans);
+ u64 min_trans);
int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
struct btrfs_key *max_key,
- struct btrfs_path *path, int cache_only,
+ struct btrfs_path *path,
u64 min_trans);
enum btrfs_compare_tree_result {
BTRFS_COMPARE_TREE_NEW,
@@ -3148,7 +3224,7 @@ int btrfs_search_slot_for_read(struct btrfs_root *root,
int find_higher, int return_any);
int btrfs_realloc_node(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct extent_buffer *parent,
- int start_slot, int cache_only, u64 *last_ret,
+ int start_slot, u64 *last_ret,
struct btrfs_key *progress);
void btrfs_release_path(struct btrfs_path *p);
struct btrfs_path *btrfs_alloc_path(void);
@@ -3459,9 +3535,9 @@ int btrfs_writepages(struct address_space *mapping,
struct writeback_control *wbc);
int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
struct btrfs_root *new_root, u64 new_dirid);
-int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
- size_t size, struct bio *bio, unsigned long bio_flags);
-
+int btrfs_merge_bio_hook(int rw, struct page *page, unsigned long offset,
+ size_t size, struct bio *bio,
+ unsigned long bio_flags);
int btrfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf);
int btrfs_readpage(struct file *file, struct page *page);
void btrfs_evict_inode(struct inode *inode);
@@ -3543,7 +3619,7 @@ int btrfs_dirty_pages(struct btrfs_root *root, struct inode *inode,
/* tree-defrag.c */
int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
- struct btrfs_root *root, int cache_only);
+ struct btrfs_root *root);
/* sysfs.c */
int btrfs_init_sysfs(void);
@@ -3620,11 +3696,14 @@ __printf(5, 6)
void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function,
unsigned int line, int errno, const char *fmt, ...);
+/*
+ * If BTRFS_MOUNT_PANIC_ON_FATAL_ERROR is in mount_opt, __btrfs_panic
+ * will panic(). Otherwise we BUG() here.
+ */
#define btrfs_panic(fs_info, errno, fmt, args...) \
do { \
- struct btrfs_fs_info *_i = (fs_info); \
- __btrfs_panic(_i, __func__, __LINE__, errno, fmt, ##args); \
- BUG_ON(!(_i->mount_opt & BTRFS_MOUNT_PANIC_ON_FATAL_ERROR)); \
+ __btrfs_panic(fs_info, __func__, __LINE__, errno, fmt, ##args); \
+ BUG(); \
} while (0)
/* acl.c */
@@ -3745,4 +3824,11 @@ static inline int is_fstree(u64 rootid)
return 1;
return 0;
}
+
+static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
+{
+ return signal_pending(current);
+}
+
+
#endif
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.